Asus AP1720-E1 - Manual (Page 78)

4-10 Chapter 4: BIOS Setup
After entering the IDE hard disk drive information into BIOS, use a disk
utility, such as FDISK, to partition and format new IDE hard disk drives.
This is necessary so that you can write or read data from the hard disk.
Make sure to set the partition of the Primary IDE hard disk drives to
active.
Precomp
This field displays the precompressed volumes on the hard disk, if any, on
the motherboard.
Landing Zone
This field displays the drive’s maximum usable capacity as calculated by
the BIOS based on the drive information you entered.
Sector
This item shows the number of sectors per track.